<?php namespace CodeIgniter\Database\SQLite3;

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014-2017 British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	CodeIgniter Dev Team
 * @copyright	2014-2017 British Columbia Institute of Technology (https://bcit.ca/)
 * @license	https://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 3.0.0
 * @filesource
 */
use CodeIgniter\Database\BaseBuilder;

/**
 * Builder for SQLite3
 */
class Builder extends BaseBuilder
{

    /**
     * Identifier escape character
     *
     * @var    string
     */
    protected $escapeChar = '`';

	/**
	 * Default installs of SQLite typically do not
	 * support limiting delete clauses.
	 *
	 * @var bool
	 */
    protected $canLimitDeletes = false;

	/**
	 * Default installs of SQLite do no support
	 * limiting update queries in combo with WHERE.
	 *
	 * @var bool
	 */
    protected $canLimitWhereUpdates = false;

    //--------------------------------------------------------------------

    /**
     * Replace statement
     *
     * Generates a platform-specific replace string from the supplied data
     *
     * @param    string    the table name
     * @param    array     the insert keys
     * @param    array     the insert values
     *
     * @return    string
     */
    protected function _replace($table, $keys, $values)
    {
        return 'INSERT OR '.parent::_replace($table, $keys, $values);
    }

    //--------------------------------------------------------------------

    /**
     * Truncate statement
     *
     * Generates a platform-specific truncate string from the supplied data
     *
     * If the database does not support the TRUNCATE statement,
     * then this method maps to 'DELETE FROM table'
     *
     * @param	string	$table
     * @return	string
     */
    protected function _truncate($table)
    {
        return 'DELETE FROM '.$table;
    }

    //--------------------------------------------------------------------

}
